Improvement in railroad-car stoves



J. MAHRENHQLZ. Raiirnad-Ear Stoves.

10,152,566 Patented) ne30,1874.

Attorneys. Y

NITED STA'rns ATENT OFFICE.

JOHN H. MAHRENHOLZ, OF NEW YORK, N. Y.

IMPROVEMENT IN RAlLRAD-CAR STOVES Specification forming part of LettersPatent No. 152,566, dated June 30, 1874; application led December 29,1873.

To all whom 'it may concern:

Be it known that I, JOHN H. MAHRENHOLZ, of New York city, in the countyand State of New York, have invented a new and useful Improvement inRailroad-Oar Stoves, of which the following is a specification Railroadcar stoves are usually so constructed and arranged that when the carupsets or the stove is displaced by a violent collision or other cause,the car is frequently set on lire, and the roasting of the helplesspassengers is added to the other horrors of a railroad accident.V

My invention has for its object to provide an improved railroad-carheater. To this end I ar "ange a closed-top tire-pot and drop-due in acylinder or casing having an open-work top, so as to present a largearea of heatingsurface, and allow the air free access to the pot andtlue on all sides, and like escape through the top of the cylinder; andI arrange a water-reservoir and steam -generator beneath the grate orfire-pot, and beneath the floor of the car, as hereinafter described.

Figure l represents a vertical section of the stove, taken on the line:1; a, of Fig. 2. Fig. 2 is a vertical section of Fig. l, taken on theline y y.

A is an outer casing or jacket, which surrounds the stove, havinganair-space between it and the stove for the admission of'cold airthrough the orice C near` the bottom. D repY resents the inner casing ofthe stove. E is the grate. F ,is the {ire-chamber, having a closed top,H, which separates it from a hotair chamber, Gr. I is the magazine,which may be removable, but, as such. will form the subject of anotherpatent. L is the cover of the magazine, which is securely fastened down,and is locked, it' considered necessary. M is the perforated cover ofthe stove, through which the heated air from the hot-air chamber isdischarged. N is the rire-due, which passesv out through the side, andconducts off the smoke and gaseous products of combustion. This flue itwill be seen drops down beneath the grate, and contains thesteam-generator O. To the upper part of this boiler or generator a pipe,l), is attached to conduct steam, or steam and water, from the boileralong beneath the Seats of the car, and, returning, discharge itscontents into the lower part of the boiler at the point Q. A constantcurrent of steam, or steam and water, is thus kept up throughout the earby means of the heat which escapes from the rechamber.

In practice the generator requires but a small supply of water-say,sutiicient to cover the bottom to the depth of one or two inchessincewhat condenses in the pipes that extend from the generator through thecar will How back into it. The supply will be introduced through a pipeextended out through the side of the stove and up through the licor It.The stove passes through this door, as seen in the drawing, and theashes and refuse, or incombustible contents, are discharged onto thetrack through the tube S, into which the grate discharges. rIhe grate isagitated and reversed by means ofthe shaft T, to which a socket-wrenchis applied. U is the damper, by means of which the draft and escape ofashes and cindcrs is regulated. Vis a bonnet on the lower end of theash-tube, which is hinged to the tube at the point IV, so that it may beturned in either direction to suit the direction of motion of the car.The stove is firmly attached to the floor of the car, and cannot bereadily displaced. It may be turned over or bottom side up withoutdischarging any fire into the car, and is, therefore, safe forpassengers in cases of collision or other accident. A

I do not claim a irechamber with an imperforate top; but

Having thus described my invention, what I do claim as new, and of myinvention, is-- 1. In a railroad-car stove, the combination of the iirepot or chamber having a closed top, the tlue N leading out of the samedownward and horizontally beneath the grate, with a cylinder-casinghaving a hot-air chamber above the fire-pot and anopen-work top, asshown and described.

2. The steam-generator O, arranged beneath the grate E and ioor It,combined with the flue N, as shown and described, as and for the purposespecified.

JOHN H. MAHRENHOLZ.

Witnesses:

T. B. Mosirnu, ALEX. F. ROBERTS.

